2

No:
It is unlikely to remain in your system very long after exposure. Some bug sprays are considered unsafe in pregnancy, but the risks are low. What is more, certain insect-born illnesses are potentially more harmful, so you'll have to weigh your risks and benefits based on your location.
I usually recommend deet-free bug sprays.
...Read more

4

Brain:
At 28 weeks it is early to say if this fluid is a concern, if the fluid continues to increase during the pregnancy then that is more of a concern and will need evaluation by a pediatric neurosurgeon.
...Read more

5

MANY:
Neural tube defects: include anencephaly (no cortex) , spina bifida (open spine) and cephalocele. Hydrocephalus is found in about 2 per 1, 000 births. Ventriculomegaly (enlarged ventricles) also holoprosencephaly (incomplete cleavage of the forebrain) agenesis of the corpus callosum, the dandy-walker complex (cyst in 4th ventricle)
microcephalus is small head/brain. Various cyst (e.g.Arachnoid).
...Read more

7

Primitive Reflexes:
Such babies have brain stems, but lack the higher cortex. Without the brain stem they wouldn't breath and their hearts wouldn't beat. The brain stem accounts for primitive reflexes, which I have seen people mistake for a conscious response.
...Read more

10

No way to tell:
In the early 80's nelson et al.Published an interesting analysis from the national collaborative perinatal project (50 k births) that found that the majority of kids with a CP DX at 7 yrs had been born after a normal p/l/d with normal apgar scores. This points out how hard it is to be sure what goes on during pregnancy. The best you can do is keep healthy and avoid risks when you can.
...Read more